Which funds can replace RYAFX?

Which mutual funds can replace RYAFX?

Which mutual funds can replace RYAFX? ranked by return similarity
Rank	Ticker	Fund	Return similarity
1	SHPIX	ProFunds Short Small Cap Fund Investor Class	99.9%
2	RYAGX	Rydex Inverse Mid-Cap Strategy Fund Class A	94.8%
3	GRZZX	Leuthold Grizzly Short Fund	89.4%